ayb FAMILY XLi;. — CIOID.E. 



typical genus, Cix, which is from a Grewk word meaning "a worm 

 in wood or grain. ' ' The beetles are mostly found under the bark of 

 trees and in dry and woody species of fungi, and are usually 

 gregarious. Some species occur in houses and are injurious in the 

 larval stage to books, furniture and old woodwork, which they 

 pierce with small round holes. The grubs which prey upon books 

 are known as "book-worms." 



The principal characters by whicli the f'ioidre may be known are 

 the 8- to lO-jointed antennse (11-jointed in one genus), inserted at 

 the front margin of the eyes, the last three joints larger, forming a 

 loose club; eyes rounded, somewhat griinulate; thorax with side 

 margins distinct, cylindrical, rounded in front, and frequently pro- 

 longed over the head. Elytra entirely ntvcnng the abdomen, the 

 latter with five free ventral segments, the first longer than the 

 others; front and middle coxa^ oval, not prominent, without troch- 

 antins, the ravitics small, separate, narrowly closed behind; legs 

 moderately short; tav.si fiiur- jointed, joints 1-3 very short, equal, 

 fourth long with simple claws. 



The principal available paper treatini;- of the North American 

 species is that by 



Casey. — "Studies in the Ptiuicte, Cioid;e and Sphindidte of 

 America," in Journ. N. Y. Entom. Soc, VI, 1898, 61-93. 



Of the nine genera recogni/ed by Casey, rei)resentatives of seven 

 have been taken in Indiana. 



KEY TO INDIANA GENEKA (tV VLOIDJE. 



a. Antenna; with last three jcjiiits larser, forming a loose club. 

 h. AntenniB tO-joiuted. 



c. Prosternum simple or nearly so. 

 (7. Body with distinct erect bristly hairs : front tibiiE usually pro- 

 duced and toothed on outer side at apex. I. Cis. 

 '/(/. Ttody glabrous or minutely pubescent; front tibiaj not toothe<l 

 or produced ; body elongate ; head and thorax simple in male. 



II. Orthocis. 

 fc. Prosternum carinate along the middle; body either glabrous or 

 with short decumbent pubescence. III. Xestocis. 



hh. .\ii(enna' S- or 0-jointed ; liedy glabrous. 



'. Frcmt tibito thickened and rounded on the outer side. 

 f. Antenuie 9-.iointed ; body narrow, cylindrical. 



TV. ENXKAIiTIIIiON. 



//. AnteiiiK,. s-jointed. V. CEKAeis 



ee. Front tibia' mirrowly triangular, the .ailei- edge straight and 



minulely spinulose; antemw S-.i,,iii(,.,l. VI (Ickitemnis 



a<i. Antenna., with jeints 5 lo 11 forming a larg,. pertinate mass 11-joiute.l- 



elytra sulcate. yu. Ehipidandbus! 



